Wikipedia is the largest online source of information
Of the top 40 websites in the world, most are either social networks, blogs, or search engines.
World Wide
The most common types of social networks are online communities with services that provide a way to connect with friends, categorize those friends, and a way to recommend friends to others.
“Popular methods now combine many of these, with Facebook, Bebo and Twitter widely used worldwide.
MySpace and LinkedIn being the most widely used in North America.
World Wide
works cited:
**http://en.wikipedia.org/wiki/Social_network_service**
http://social-networking-websites-review.toptenreviews.com/